Abstract This thesis collects a series of publications that present work related to the topic of sonic interaction design for diversity and inclusion. The publications focus on individual studies in which musical interfaces were either developed or reviewed. While the projects discussed in this thesis are substantially different in their nature, they all contribute to the thesis in terms of providing reflections on how musical interfaces could be designed to enable inclusion rather than exclusion. In the context of these works, I position myself as an engineer and designer with a focus on sonic interaction. Inspired by the experience of playing an acoustic instrument, I propose that one way of enabling musical inclusion for underrepresented groups (e.g. persons with visual- and hearing-impairments, as well as elderly) is to design digital musical instruments (DMIs) as rich multisensory experiences allowing for multiple modes of interaction, while at the same time enabling customization to fit each user’s needs, both in terms of gestural control and provided sonic output. The computer music community has the potential to actively engage and include more persons in music-making activities. Identifying the challenges that people face in these contexts is essential in order to be able to create initiatives towards changing practices.